Typhlopolycystis coeca Karling, 1956

Schockaert, Ernest R., Moons, Patricia, Janssen, Toon, Tessens, Bart S., Reygel, Patrick C., Revis, Nathalie, Jouk, Philippe E. H., Willems, Wim R. & Artois, Tom J., 2019, On the genus Typhlopolycystis Karling, 1956 (Platyhelminthes, Kalyptorhynchia, Polycystididae), with data on the five known species and the description of eleven new species, Zootaxa 4603 (1), pp. 81-104 : 85

Typhlopolycystis coeca Karling, 1956

( Fig. 2 )

Diagnosis. Yellowish species of Typhlopolycystis , 1.5 mm long with a very large proboscis (1/3 of body length) and no eyes. Prostate vesicle and accessory secretion vesicle well developed. The prostate stylet is a short and straight gutter without thickenings (20–25 µm long) and the accessory stylet is a slightly curved tube, 26–30 µm long, both sitting on a ring with a diameter of about 25–30 µm over its largest cross section.

Occurrence. Sweden: Kristineberg, Bredungen, silty bottom at 38 m (type locality). Other localities near Kristineberg (by Westblad and Karling). Germany: several sublittoral stations in the Bight of Kiel (by Ax) (see Karling, 1956); Koningshaven on the Island of Sylt (medium sand, eulittoral)(by Ax, 16 August 1965, Noldt, 1989).

Studied material: the holotype (SMNH type nr 2701), one more whole mount of an animal from the Kristineberg area (SMNH nr 82300), and one from Sylt (SMNH nr 43585).

Figures

FIGURE 2. Typhlopolycystis caeca Karling, 1956. Copulatory organ (A) in the holotype and (B) of an individual from Sylt. (scale = 20 µm)